Guide rail grounding terminal structure

Abstract

The present invention discloses a grounding terminal structure for a guide rail, which includes an insulating body, a guide rail and a grounding terminal. One end of the insulating body can be snap-connected to one end of the guide rail, and the grounding terminal can be fixed to the other end of the insulating body. The grounding terminal is provided with solder joints for electrically connecting with a circuit board. A horizontal fixed contact, a vertical fixed contact and an elastic contact are also formed on the grounding terminal. The horizontal fixed contact, the vertical fixed contact and the elastic contact exactly enclose an inclined channel that forms an angle with the extending direction of the guide rail. The other end of the guide rail can be inserted into the inclined channel in an inclined state. The end of the other end of the guide rail abuts against the vertical fixed contact, the upper side of the other end of the guide rail tightly abuts against the horizontal fixed contact, and the lower side of the other end of the guide rail tightly abuts against the elastic contact. The elastic contact and the horizontal fixed contact are arranged alternately in the thickness direction of the guide rail. The elastic deformation of the elastic contact can change the distance between it and the horizontal fixed contact. The present invention can maintain a stable clamping force on the guide rail and is convenient to use.

Description

Technical Field

[0001] The present invention relates to the technical field of connectors, and particularly to a rail grounding terminal structure. Background Art

[0002] The grounding terminal structure of the prior art is single, and it contacts the rail only through one contact point. After the rail is assembled, the contact stability with the contact point of the grounding terminal is poor. During use, the rail is prone to falling off, and during the assembly and disassembly processes, the grounding terminal is also prone to problems such as deformation and breakage, resulting in poor stability of the connector. Summary of the Invention

[0003] In order to make up for the above deficiencies, the present invention provides a rail grounding terminal structure, which can improve the contact stability between the grounding terminal and the rail, and further improve the safety of the product.

[0004] The technical solution adopted by the present invention to solve its technical problems is: a rail grounding terminal structure, including an insulating body, a rail, and a grounding terminal. One end of the insulating body can be snap-connected to one end of the rail, and the grounding terminal can be fixedly installed at the other end of the insulating body. The grounding terminal is provided with solder joints for electrically connecting with the circuit board inside the insulating body. Horizontally fixed contacts, vertically fixed contacts, and elastic contacts are fixedly formed on the grounding terminal. The horizontally fixed contacts, vertically fixed contacts, and elastic contacts just enclose an inclined channel with a set angle with the extending direction of the rail. The other end of the rail can be inserted into the inclined channel in an inclined state. The end of the other end of the rail abuts against the vertically fixed contact, the upper side of the other end of the rail tightly abuts against the horizontally fixed contact, the lower side of the other end of the rail tightly abuts against the elastic contact, and the elastic contacts and the horizontally fixed contacts are arranged alternately in the thickness direction of the rail. The elastic deformation of the elastic contacts can change the distance between them and the horizontally fixed contacts.

[0005] During assembly, first fix the grounding terminal and the insulating body together, and electrically connect the soldering point of the grounding terminal to the circuit board inside the insulating body. Then assemble the guide rail. When assembling the guide rail, first suspend one end of it, and insert the other end obliquely into the inclined channel formed by the horizontal fixed contact, vertical fixed contact and elastic contact of the grounding terminal. When the end of the other end of the guide rail abuts against the vertical fixed contact, the guide rail cannot be inserted further. At this time, the upper and lower side walls of the other end of the guide rail respectively abut against the surfaces of the horizontal fixed contact and the elastic contact. Then, pull one end of the guide rail to make one end of the guide rail snap-connect with one end of the insulating body. At this time, the guide rail rotates with the horizontal fixed contact as the fulcrum. The lower side wall of the guide rail presses against the elastic contact, causing the elastic contact to elastically deform away from the horizontal fixed contact. Finally, the guide rail forms a horizontally extended state. Due to the elastic force of the elastic contact itself, an elastic torsion force is given to the other end of the guide rail, so that one end of the guide rail remains tightly snapped with the insulating body, and at the same time, the other end of the guide rail remains in a stable clamping state with the grounding terminal. When disassembling the guide rail, just first disconnect one end of the guide rail from the insulating body. Under the action of the elastic reset force of the elastic contact of the grounding terminal, the guide rail automatically rotates around the horizontal fixed contact, causing one end of the guide rail to rotate downward away from the insulating body. The guide rail forms an inclined state and can be pulled out from between the horizontal fixed contact and the elastic contact of the grounding terminal. This structure makes the product safer and more reliable during use, and it is also more convenient to disassemble the guide rail. The above structure can meet the current-carrying use of the product and disassemble the guide rail without adverse conditions such as terminal thermal deformation and terminal yield, making the product more stable and safe.

[0006] As a further improvement of the present invention, the surface of the horizontal fixed contact of the grounding terminal is a horizontal plane parallel to the extending direction of the guide rail, and the surface of the vertical fixed contact is a vertical plane perpendicular to the extending direction of the guide rail. The horizontal fixed contact being a horizontal plane enables the guide rail to maintain a close contact state with the horizontal fixed contact when finally in a horizontal state, with a large contact area, strengthening the assembly stability of the product and the ability to withstand impact current.

[0007] As a further improvement of the present invention, the grounding terminal is connected by an inclined surface between the surface of the horizontal fixed contact and the root of the vertical fixed contact, and the inclined surface forms the upper side wall of the inclined channel for inserting the other end of the guide rail. The inclined channel formed by the inclined surface plays a guiding role in inserting the other end of the guide rail.

[0008] As a further improvement of the present invention, the elastic contact is a hook-shaped cantilever structure. The end surface of the hook-shaped cantilever structure is parallel to the inclined surface between the horizontal fixed contact and the vertical fixed contact in the free state, and the end surface of the hook-shaped cantilever structure and its side wall are smoothly connected through a rounded corner. The elastic deformation of the elastic contact is realized through the hook-shaped cantilever structure. In the free state, an inclined channel is formed between the elastic contact and the inclined surface, which plays a guiding role for the insertion of the other end of the guide rail. When the guide rail is toggled and the guide rail rotates around the horizontal fixed contact, the hook-shaped cantilever structure is pried by the lower side surface of the guide rail to generate deformation, and its rounded corner tightly abuts against the lower side surface of the track.

[0009] As a further improvement of the present invention, the structure in which the grounding terminal can be fixedly installed at the other end of the insulating body is as follows: A fixed convex column extending in the horizontal direction and a horizontal slot extending in the horizontal direction are fixedly provided on the insulating body. The fixed convex column can be inserted into the internal part of the hook-shaped cantilever structure of the elastic contact in a circumferential direction to prevent movement. A recessed part is formed on the inner side wall of the horizontal slot of the insulating body. A horizontal insertion piece extending in the horizontal direction is fixedly provided on the grounding terminal. An anti-clamping structure is formed at the end of the horizontal insertion piece. The horizontal insertion piece can be inserted into the horizontal slot of the insulating body, and the anti-clamping structure at its end can be snap-connected with the recessed part on the side wall of the horizontal slot.

[0010] The grounding terminal is in transitional fit with the fixed convex column on the insulating body through the circle in the middle of the hook-shaped cantilever structure to complete the main positioning of the grounding terminal. The anti-clamping structure at the end of the horizontal insertion piece on the grounding terminal has been inserted into the horizontal slot of the insulating body to form an interference fit, and the anti-clamping structure is snap-connected with the recessed part on the horizontal slot to form a snap-fitting and fixed positioning. The two side walls of the horizontal slot are preferably formed by the spaced-apart body ribs of the cantilever. When the horizontal insertion piece is inserted, the body ribs can elastically deform and give way to ensure that the grounding terminal is smoothly inserted into the insulating body. The above structure completes the mutual fixation between the grounding terminal and the insulating body.

[0011] As a further improvement of the present invention, an open-shaped receiving groove matching the shape of the grounding terminal is formed on the insulating body, and the grounding terminal is received in the receiving groove. The horizontal slot and the fixed convex column are respectively located on the side wall and the bottom surface of the receiving groove. The receiving groove receives the grounding terminal, avoids the grounding terminal being exposed outside, avoids the grounding terminal falling off under the action of external force, improves the connection stability between the grounding terminal and the insulating body, and at the same time effectively protects the grounding terminal and avoids its damage.

[0012] As a further improvement of the present invention, the grounding terminal is a single-layer L-shaped structure. The horizontal fixed contact, the vertical fixed contact and the elastic contact are located on one side wall of the L shape, and the solder joint and the horizontal insertion piece are located on the other side wall of the L shape. The grounding terminal with a single-layer structure contacts the guide rail. The single-layer grounding terminal structure is relatively simple and has a low cost. By the cooperation of the metal grounding terminal and the insulating body, a continuous and stable clamping force is achieved, making the product safer and more reliable during use, and it is also more convenient to disassemble the guide rail.

[0013] As a further improvement of the present invention, a reverse-buckle-shaped body buckle structure is further provided on the side wall of the receiving groove, and the hook-shaped cantilever structure of the elastic contact abuts against the side facing the bottom surface of the receiving groove of the reverse-buckle-shaped body buckle structure. The hook-shaped cantilever structure of the single-layer grounding terminal is fastened and fixed by the reverse-buckle-shaped body buckle structure of the insulating body to prevent the grounding terminal from detaching from the insulating body during use. The two anti-detachment and fixing structures complete the complete fixation of the grounding terminal and the insulating body, making the grounding terminal more stable and firm during transportation and use, and having high safety.

[0014] As a further improvement of the present invention, the grounding terminal is a double-layer U-shaped structure. The paired horizontal fixed contacts, vertical fixed contacts and elastic contacts are located on two opposite side walls of the U shape, and the solder joints and the horizontal insertion pieces are located on the bottom surface of the U shape. The grounding terminal with a double-layer structure contacts the guide rail, increasing the number of contact points with the guide rail and enhancing the anti-impulse current ability of the product; adopting an integrated structure, the overall product is more firm, and at the same time, a more complex assembly method is avoided, which is convenient to use while meeting high-impulse current.

[0015] As a further improvement of the present invention, a notch structure is formed on the bottom surface of the U shape of the grounding terminal. Barbed protrusions are respectively formed on the two side walls of the notch. A convex block structure is provided on the insulating body. The convex block structure can be inserted into the notch structure formed on the bottom surface of the U shape of the grounding terminal, and the barbed protrusions on the two side walls of the notch on the bottom surface of the U shape of the grounding terminal can be snap-connected to the side wall of the convex block structure on the insulating body. When the double-layer structure grounding terminal is assembled with the insulating body, the double-layer grounding terminal is in transitional fit with the fixing convex column of the insulating body through the circle in the middle of the hook-shaped cantilever structures on both side walls to complete the main positioning of the grounding terminal; at the upper end, the barbed protrusions are in interference fit with the convex block structure of the insulating body, and the barbs are pierced into the convex block structure to complete the mutual fixation of the grounding terminal and the insulating body; the inverted buckle structure at the end of the horizontal insertion piece formed by bending the hook-shaped cantilever structure located outside at the lower end of the grounding terminal completely penetrates into the horizontal insertion opening on the side wall of the receiving groove of the insulating body, firmly hooking the body to prevent the grounding terminal from detaching from the insulating body during use. The two anti-detachment structures cooperate with each other to achieve the final fixation of the grounding terminal, making the grounding terminal more stable and firm during transportation and use, and having high safety.

[0016] The beneficial technical effects of the present invention are as follows: By designing a horizontal fixed contact, a vertical fixed contact, and an elastic contact on the grounding terminal to form an inclined channel, when the guide rail is assembled and inserted into the inclined channel, and the guide rail is rotated to complete the assembly by pulling, the guide rail presses against the elastic contact with the horizontal fixed contact as the fulcrum, causing the elastic contact to deform. As a result, one end of the guide rail is firmly buckled and connected to the insulating body. At the same time, the other end of the guide rail is tightly clamped by the horizontal fixed contact and the elastic contact of the grounding terminal. The grounding terminal can meet the requirements of product current conduction and disassembly of the guide rail without any adverse conditions such as terminal thermal deformation and terminal yielding. The product is more stable and safe during use. The grounding terminal of the present invention can form a single-layer structure and a double-layer structure. The single-layer grounding terminal has a simple structure and low cost. While maintaining a stable clamping force, it is also more convenient to disassemble the guide rail. The double-layer grounding terminal contacts the guide rail, increasing the number of contact points with the guide rail and enhancing the product's ability to withstand impact current. With an integrated structure, the overall product is more robust, and at the same time, a relatively complex assembly method is avoided. It can meet high impact current requirements and is also quite convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Is a perspective view of the grounding terminal in Embodiment 1;

[0018] Figure 2 Is a front view of the grounding terminal in Embodiment 1;

[0019] Figure 3 Is a top view of the grounding terminal in Embodiment 1;

[0020] Figure 4 Is a right view of the grounding terminal in Embodiment 1;

[0021] Figure 5 Is a front view of the insulating body in Embodiment 1;

[0022] Figure 6 Is Figure 6 A partial cross-sectional view taken along line A-A in

[0023] Figure 7 Is a schematic diagram of the initial assembly state of the guide rail in Embodiment 1;

[0024] Figure 8 Is a schematic diagram of the counterclockwise rotation state of the insulating body in Embodiment 1;

[0025] Figure 9 Is Figure 8 An enlarged view of part B in

[0026] Figure 10 Is a schematic diagram of the completed assembly state of the guide rail in Embodiment 1;

[0027] Figure 11 A perspective view of the grounding terminal in Embodiment 2;

[0028] Figure 12 It is the unfolded state diagram of the grounding terminal in Embodiment 2;

[0029] Figure 13 It is the front view of the insulating body in Embodiment 2;

[0030] Figure 14 It is Figure 13 The partial sectional view taken along the C-C direction in

[0031] Figure 15 It is the schematic diagram of the initial assembly state of the guide rail in Embodiment 2;

[0032] Figure 16 It is Figure 15 The enlarged view of part D in

[0033] Figure 17 It is the schematic diagram of the counterclockwise rotation state of the insulating body in Embodiment 2;

[0034] Figure 18 It is the completed assembly state diagram of the guide rail in Embodiment 2;

[0035] Figure 19 It is Figure 18 The enlarged view of part E in

[0036] Figure 20 It is Figure 19 The sectional view taken along the F-F direction in

[0037] Figure 21 It is Figure 19 The sectional view taken along the G-G direction in Specific Embodiments

[0038] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0039] Embodiment 1: The grounding terminal adopts a single-layer structure. The single-layer grounding terminal 10 cooperates with the insulating body assembled therewith by using a metal sheet to achieve stable contact with the guide rail.

[0040] The single-layer grounding terminal 10 is welded to the PCB board inside the insulating body 20 through the first solder joint 11 to form a circuit inside the product.

[0041] The single-layer grounding terminal achieves its primary positioning through a transitional fit between the first circle 15 in the middle of the single-piece hook-shaped cantilever structure and the first fixed protrusion 23 of the insulating body. The upper end of the single-layer grounding terminal 10 is interference-fitted with the first inverted buckle structure 17 on the horizontal insert and the horizontal slot 21 of the insulating body. The first inverted buckle structure 17 engages with the recessed portion of the first horizontal slot 21 to secure the single-layer grounding terminal 10 to the insulating body. The metal sheet at the lower end of the hook-shaped cantilever structure 16 of the single-layer grounding terminal 10 is secured by the inverted buckle-shaped body snap structure 22 of the insulating body, preventing the single-layer grounding terminal 10 from detaching from the insulating body during use. These two anti-detachment and fixing structures completely secure the single-layer grounding terminal 10 to its insulating body, making the grounding terminal more stable and secure during transportation and use, and providing increased safety.

[0042] The single-layer grounding terminal 10 has three contact points, namely a first transverse fixed contact 12 , a first vertical fixed contact 13 and a first elastic contact 14 , which are in close contact with the guide rail 1 . During use of the product, first tilt the product at a certain angle so that the inclined channel of the single-layer grounding terminal can be smoothly inserted into the right side of the guide rail. Because the guide rail and the insulating body are in an inclined state with an angle when inserting, the inclined channel of the guide rail and the single-layer grounding terminal are in a clearance fit at this time; next, buckle the insulating body counterclockwise downward. During the rotation process, the gap between the single-layer grounding terminal on the right and the guide rail gradually shrinks until it is completely supported. At this time, the first horizontal fixed contact 12, the first vertical fixed contact 13 and the first elastic contact 14 of the single-layer grounding terminal 10 are fully in contact with the guide rail; finally, still use force to buckle the insulating body counterclockwise downward. Because the single-layer grounding terminal and the guide rail are already fully in contact in the previous state, when the insulating body is buckled downward again, the first elastic plastic structure 24 on the left will be smoothly inserted into the left guide rail, and the first elastic plastic structure 24 provides stable and reliable Fa and Fb forces to tightly connect the guide rail and the single-layer grounding terminal.

[0043] Example 2: The grounding terminal adopts a double-layer structure. The double-layer grounding terminal 30 is made of a plate that is bent inward at the bottom surface 33 to form a first side wall 31 and a second side wall 32 of a U-shaped structure, thereby forming a double-layer grounding terminal. It is an integrated double-layer grounding terminal.

[0044] The double-layer grounding terminal is welded to the PCB board inside the product through the second welding point 37, so that a passage is formed inside the product.

[0045] The double-layer grounding terminal 30 is mainly positioned by transitionally fitting the second circle 34 in the middle of the double-piece hook-shaped cantilever structure with the second fixed protrusion 42 of the insulating body; a notch structure is formed on the bottom surface of the U-shaped structure at the upper end of the double-layer grounding terminal 30, and barbed protrusions 35 are formed on the two side walls of the notch. The barbed protrusions 35 are interference-fitted with the protrusion structure 41 of the insulating body, and the barbs pierce into the protrusion structure 41 to complete the mutual fixation of the double-sided grounding terminal 30 and the insulating body; the hook-shaped cantilever structure on the outer side of the double-sided grounding terminal 30 is bent to form a horizontal insert, and the end of the horizontal insert of the double-sided grounding terminal 30 forms a second inverted structure 36. The second inverted structure 36 is completely deep in the second horizontal slot 43 of the insulating body, firmly hooking the insulating body and preventing the double-layer grounding terminal from detaching from the insulating body during use. The two anti-detachment structures cooperate with each other to achieve the final fixation of the double-layer grounding terminal, making the double-layer grounding terminal more stable and secure during transportation and use.

[0046] The double-layer grounding terminal has six contact points: the second horizontal fixed contact 311, the third horizontal fixed contact 321, the second vertical fixed contact 313, the third vertical fixed contact 323, the second elastic contact 312, and the third elastic contact 322. These six contact points are in close contact with the guide rail 01. The second horizontal fixed contact 311, the second elastic contact 312, the third horizontal fixed contact 321, and the third elastic contact 322 have an interference fit with the guide rail. The interference fit between the guide rail and the double-layer grounding terminal 30 exerts a counter-acting external tension on the four interfering contact points. The first hook-shaped cantilever structure 314 and the second hook-shaped cantilever structure 324 of the double-layer grounding terminal 30 play a crucial role in the entire process of mating with the guide rail. Because the first and second hook-shaped cantilever structures 314 and 324 are composed of long arcs, they deform under the external tension provided by the guide rail, providing a stable clamping force on the guide rail and ensuring greater safety and reliability during product use. Furthermore, the deformable arc provides a stable clamping force and also facilitates guide rail removal.

[0047] Next, when installing the guide rail, the double-layer grounding terminal follows the same assembly principle as the single-layer grounding terminal. The insulating body is fastened counterclockwise downward. On the left side of the insulating body, a second elastic plastic structure 44 also provides stable and reliable Fa and Fb forces, making the guide rail 1 and the double-layer grounding terminal 30 more tightly connected.

Claims

1. A guide rail grounding terminal structure, comprising an insulating body, a guide rail and a grounding terminal. One end of the insulating body can be snap-connected to one end of the guide rail, the grounding terminal can be fixedly installed at the other end of the insulating body, and a solder joint for electrically connecting with the circuit board in the insulating body is provided on the grounding terminal. It is characterized in that: On the grounding terminal, there are also fixedly formed a horizontal fixed contact, a vertical fixed contact, and an elastic contact. The horizontal fixed contact, the vertical fixed contact, and the elastic contact exactly enclose an inclined channel that has a set angle with the extending direction of the guide rail. The other end of the guide rail can be inserted into the inclined channel in an inclined state. The end of the other end of the guide rail abuts against the vertical fixed contact. The upper side of the other end of the guide rail tightly abuts against the horizontal fixed contact, and the lower side of the other end of the guide rail tightly abuts against the elastic contact. The elastic contact and the horizontal fixed contact are arranged alternately in the thickness direction of the guide rail. The elastic deformation of the elastic contact can change the distance between it and the horizontal fixed contact. The surface of the horizontal fixed contact of the grounding terminal is a horizontal plane parallel to the extending direction of the guide rail, and the surface of the vertical fixed contact is a vertical plane perpendicular to the extending direction of the guide rail. The grounding terminal is connected between the surface of the horizontal fixed contact and the root of the vertical fixed contact through an inclined surface. The inclined surface forms the upper side wall of the inclined channel for the other end of the guide rail to be inserted. The elastic contact is a hook-shaped cantilever structure. The surface of the end of the hook-shaped cantilever structure is parallel to the inclined surface between the horizontal fixed contact and the vertical fixed contact in the free state. The surface of the end of the hook-shaped cantilever structure and its side wall are smoothly connected through a fillet.

2. The grounding terminal structure of the guide rail according to claim 1, characterized in that: The structure for the grounding terminal to be fixedly installed at the other end of the insulating body is as follows: On the insulating body, there are fixedly provided a fixing convex column extending in the horizontal direction and a horizontal slot extending in the horizontal direction. The fixing convex column can be inserted into the inside of the hook-shaped cantilever structure of the elastic contact with circumferential stop. On the inner side wall of the horizontal slot of the insulating body, there is a recess formed. On the grounding terminal, there is fixedly provided a horizontal insertion piece extending in the horizontal direction. The end of the horizontal insertion piece forms a reverse buckle structure. The horizontal insertion piece can be inserted into the horizontal slot of the insulating body, and the reverse buckle structure at its end can be snap-connected with the recess on the side wall of the horizontal slot.

3. The grounding terminal structure of the guide rail according to claim 2, characterized in that: On the insulating body, there is an open-shaped receiving groove matching the outer shape of the grounding terminal. The grounding terminal is received in the receiving groove. The horizontal slot and the fixing convex column are respectively located on the side wall and the bottom surface of the receiving groove.

4. The grounding terminal structure of the guide rail according to claim 3, characterized in that: The grounding terminal is an L-shaped single-layer structure. The horizontal fixed contact, the vertical fixed contact, and the elastic contact are located on one side wall of the L shape. The solder joint and the horizontal insertion piece are located on the other side wall of the L shape.

5. The grounding terminal structure of the guide rail according to claim 4, characterized in that: On the side wall of the receiving groove, there is also provided a reverse buckle-shaped body snap structure. The hook-shaped cantilever structure of the elastic contact abuts against the side facing the bottom surface of the receiving groove of the reverse buckle-shaped body snap structure.

6. The rail grounding terminal structure according to claim 3, characterized in that: The grounding terminal is a U-shaped double-layer structure. The paired horizontal fixed contacts, vertical fixed contacts, and elastic contacts are located on two opposite side walls of the U shape. The solder joint and the horizontal insertion piece are located on the bottom surface of the U shape.

7. The grounding terminal structure of the guide rail according to claim 6, characterized in that: On the bottom surface of the U shape of the grounding terminal, there is also formed a notch structure. On the two side walls of the notch, there are respectively formed barbed protrusions. On the insulating body, there is provided a convex block structure. The convex block structure can be inserted into the notch structure formed on the bottom surface of the U shape of the grounding terminal, and the barbed protrusions on the two side walls of the notch on the bottom surface of the U shape of the grounding terminal can be snap-connected with the side wall of the convex block structure on the insulating body.

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